Suppose that you have 520 feet of rope and want to use it to make a rectangle. What dimensions should you make your rectangle if you want to enclose the maximum possible area?

Answer 1

520/4 = 130 x 130 feet

the biggest area is with a square. A square has 1/4 dimensions for each side. with 1/4 of the total perimeter. 1/4 of 520 is 130 feet.